I just bought a Samsung 840 Pro SSD. I hooked it up to a PC and updated the firmware with the SSD Magician software. I now see that the Magician software has a section called "Over Provisioning". Do I need to do anything here before moving the SSD to my Mac? My old OWC SSDs all have built in over provisioning. Since the Samsung drive apparently does not come with it out of the box, do I need to set this up on my PC before moving it to my Mac, or what's the deal here. Also, should I enable Trim on my Mac or not?